#!usr/bin/env python  
# -*- coding: utf-8 -*-
""" 
@author:Simon
@file: objdemo15.py 
@time: 2018/01/19 
"""
def foo(s):
    n = int(s)
    # print('>>> m = 5d' %n)
    assert n!=0, 'n is zero!'
    return  10 /n

def main():
    foo('0')

main()